public void Execute()
{
_writer.WriteLine("Please enter a value between (but not including) -1 quadrillion and +1 quadrillion.");
while (true)
{
string userInput = _reader.ReadCurrency();
if (_currencyConverter.ValidateAmount(userInput) == false)
{
_writer.WriteLine($"'{userInput}' was not a valid amount. Please try again.");
continue;
}
_writer.WriteLine(_currencyConverter.ConvertToEnglish(userInput));
}
}